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Finding the Fourth Proportional to 85,557.59, 128,358.25 and 35,621.09

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Solution

The fourth proportional to 85,557.59, 128,358.25 and 35,621.09 is: 53,440.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,557.59 : 128,358.25 = 35,621.09 : x
  2. Step 2: Convert to fraction form
    85,557.59/128,358.25 = 35,621.09/x
  3. Step 3: Cross multiply
    85,557.59x = 128,358.25 × 35,621.09
  4. Step 4: Simplify right side
    85,557.59x = 4,572,260,133.70
  5. Step 5: Solve for x
    x = 4,572,260,133.70/85,557.59
  6. Step 6: Final answer
    x = 53,440.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.